II ADVERTISEMENT. 



III. Geology of tho Oomstock Loiie auil tho Washoe District, with atlas, by George F. Becker. 1882. 

 4°. XV, 422 pp. 7 pi. and athwof 21 sheetslolio. Price $11.00. 

 rV. Comst^jck Milling .111(1 Miner,s, by Eliot Lord. 188:5. 4°. xiv, 451 pp. 3 pi. Price $1.50. 



V. The Copper-Bearing Bock.s of Lake Superior, by lioland Duor Irving. 1883. 4°. xvi, 464 pp. 

 151. 29 pi. and maps. Price $1.85. 



VI. Contributions to tho Kuowledge of the Older Mosozoic Flora of Virginia, by William Morris 

 Fontaine. 1883. 4°. xi, 144 pp. 541. 54 pi. Price $1.05. 



VII. Silver-Le.ad Deposits of Eureka, Nevada, by Joseph Story Curtis. 1884. 4°. xiii,200pp. 16 

 pi. Price $1.20. 



Vni. P.tleontology of the Eureka District, by Charles Doolittlo Walcott. 1884. 4°. xiii, 298 pp. 

 24 1. 24 pi. Price $1.10. 



IX. Bra«hiopoda and Lamellibranchiata of the Raritan Clays and Greensand Marls of New Jersey, 

 by Robert P. Whitfield. 1885. 4°. xx,338pp. 35 pi. 1 map. Price $1.15. 

 • X. Dinocerata. A Monograph of an Extinct Order of Gigantic Mammals, by Othniel Charles Marsh. 

 1886. 4°. xviii, 243 pp. 50 1. 5G pi. Price $2.70. 



XI. Geological History of Lake Lahontan, a Quatern.ary L.ike of Northwestern Nevada, by Israel 

 Cook Russell. 1885. 4°. xiv,288pp. 46 pi. and maps. Price $1.75. 



XII. Geology and Mining ludu.stry of Leadville, Colorado, with atlas, by Samuel Franklin Emiiioiis. 

 1886. 4°. xxix, 770 pp. 45 pi. .and atlas of 35 sheets folio. Price $8.40. 



XTII. Geology of the Quicksilver Depo.sits of the Pacific Slope, with athas, by George F. Becker. 

 1888. 4°. xix, 486 pp. 7 pi. and atlas of 14 sheets folio. Price $2.00. 



XIV. Fossil Fishes and Fos.sil Plants of the Triassic Rocks of New Jersey .and the Connecticut Val- 

 ley, by John S.Newberry. 1888. 4°. xiv,152pp. 26 ]d. I'rice $1.00. 



XV. The Potimiac or Younger Me.sozoic Flora, by William Morris Fontaine. 1889. 4°. xiv, 377 

 pp. 180 pi. Text and jilates bound separately. Price $2.50. 



XVI. The Paleozoic Fishes of North America, by John Strong Newberry. 1889. 4°. 340 pp. 53 pi. 

 Price $1.00. 



XVII. The Flora of the Dakota Group, a posthumous work, by Leo Lesquereux. Edited by F. U. 

 Knowlton. 1891. 4°. 400 pp. 60 pi. Price $1.10. 



XVIII. Gasteropoda and Ceplialopoila of llie Raritan Cliiys and Greensiind Marls of New Jersey, 

 by Robert P. Whitfield. 1891. 4". 402 pp. ,50 pi. Price $1.00. 



XIX. Tlio Penokee Iron-Bearing Series of Northern Wisconsin and Michigan, by Roland D. Irving 

 .and C. R. ^'an Uise. 1892. 4^. 



XX. Geology of tho Eureka District, Nevada, with atlas, by Arnold Hague. 1892. 4°. 419 pp. 8 pi. 



In press : 



XXI. The Tertifiry Rhynchophorous Coleoptcra of North America, by Samuel Ilubbaid Scudder. 



XXII. A Manual of Topographic Methods, by Henry Gannett, chief topographer. 



XXIII. Geology of the Green Mountains in Massachusetts, by Raphael Punipelly, J. E. AVolft', 

 T. Nelson Dale, and Bayard T. Putnam. 



In preparation : 



— MoUiisca and Crustacea of the Miocene Form.ations of New Jersey, by R. P. Whitfield. 



— Saurojioda, by O. C. Marsh. 



— Stegosauria, by O. C. Marsh. 



— Brontotheridib, by O. C. Marsh. 



— Report on the Denver Coal Basin, by S. F. Emmons. 



— Report on Silver Cliff and Ten-Mile Mining Districts, Coloi'ado, by S. F. Eiumona. 



— The Glacial Lake Agaasiz, by Warren Upham. 



BULLETINS. 



1. On Hypersthene- Andesite and on Triclinic Pyroxene in Augitic Rocks, by Whitm.an Cross, with a 

 Geological Sketch of Bufl'alo Peaks, Colorado, by S. F. Emmons. 1883. 8°. 42 pp. 2 pi. Price 10 cents. 



2. Gold and Silver Conversion Tables, giving the coining v.alue of troj- ounces of fine metal, etc., com- 

 puted by Albert Williams, jr. 1883. 8^. 8 pp. Price 5 cents. 



3. On the Fossil Faunas of the Upper Devonian, .along tho meridian of 76° 30', from Tompkins County, 

 New York, to Bradford County, Pennsylvania, by Henry S. Williams. 1884. 8°. 36 pp. Price 5 cents. 



4. On Mesozoic Fossils, by Charles A. White. 1884. 8°. 30 pp. 9 pi. Price 5 cents. 



5. A Diction.ary of Altitudes in the United States, compiled by Heni-y Gannett. 1884. 8°. 325 pp. 

 Price 20 cents. 



G. Elevations in the Dominion of Canada, by J. W. Spencer. 1884. 8°. 43 pp. Price 5 cents. 



7. Mapoteca Geologica Americana. A Catalogue of Geological Maps of America (North and South). 

 1752-1881, in geographic and chronologic order, bj' Jules Marcou and John Belknap Marcou. 1884. 

 8°. 184 pp. Price 10 cents. 



8. On Secondary Enlargements of Mineral Friigments in Certain Rocks, by R. D. Irving and C. R. 

 Van Hise. 1884. 8°. 56 pp. 6 pi. Price 10 cents. 



9. A report of work done in the Washington Laboratory during the fiscal year 1883-'84. F. W. Clarke, 

 chief chemist. T. M. Chatard, assistant chemist. 1884. 8''. 40 jtp. I'rice 5 cents. 



